
package com.luntan.action;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.luntan.util.web.Sort;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.imageio.stream.ImageOutputStream;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONSerializer;
import net.sf.json.JsonConfig;
import net.sf.json.util.JSONTokener;
import org.apache.struts2.ServletActionContext;

/**
 * 控制层基类
 *
 * @author MaShiQiong
 * @date 2016-11-14 16:14:29
 */
public class BaseAction extends ActionSupport {

    private static final long serialVersionUID = -8414438978156820664L;

    protected List jSonToList(String str) {
        JSONArray jsonArray = (JSONArray) JSONSerializer.toJSON(str);
        JsonConfig jsonConfig = new JsonConfig();
        jsonConfig.setRootClass(Sort.class);
        List list = (List) JSONSerializer.toJava(jsonArray, jsonConfig);
        return list;
    }

    protected String unicodeToUTF8(String str) {
        if (str == null || "".equals(str)) {
            return str;
        }
        return new JSONTokener(str).nextValue().toString();
    }

    public String code() throws Exception {
        //在内存中创建图象
        int width = 60, height = 20;
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        //获取图形上下文
        Graphics g = image.getGraphics();
        //生成随机类
        Random random = new Random();
        //设定背景色
        g.setColor(getRandColor(200, 250));
        g.fillRect(0, 0, width, height);
        //设定字体
        g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
        //随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
        g.setColor(getRandColor(160, 200));
        for (int i = 0; i < 155; i++) {
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int xl = random.nextInt(12);
            int yl = random.nextInt(12);
            g.drawLine(x, y, x + xl, y + yl);
        }
        //取随机产生的认证码(4位数字)
        String sRand = "";
        for (int i = 0; i < 4; i++) {
            String rand = String.valueOf(random.nextInt(10));
            sRand += rand;
            // 将认证码显示到图象中
            g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
            //调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
            g.drawString(rand, 13 * i + 6, 16);
        }
        //将认证码存入SESSION
        ActionContext.getContext().getSession().put("rand", sRand);
        //图象生效
        g.dispose();
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        ImageOutputStream imageOut = ImageIO.createImageOutputStream(output);
        ImageIO.write(image, "JPEG", imageOut);
        imageOut.close();
        ByteArrayInputStream input = new ByteArrayInputStream(output.toByteArray());
        this.setInputStream(input);
        return SUCCESS;
    }

    public void setInputStream(ByteArrayInputStream inputStream) throws Exception {
        throw new Exception("子类需要覆盖此方法");
    }

    public ByteArrayInputStream getInputStream() throws Exception {
        throw new Exception("子类需要覆盖此方法");
    }

    /*
     * 给定范围获得随机颜色
     */
    private Color getRandColor(int fc, int bc) {
        Random random = new Random();
        if (fc > 255) {
            fc = 255;
        }
        if (bc > 255) {
            bc = 255;
        }
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }

    /**
     * AJAX信息提示
     *
     * @param content
     * @throws IOException
     */
    public void sendMsg(String content) throws IOException {
        HttpServletResponse response = ServletActionContext.getResponse();
        response.setCharacterEncoding("UTF-8");
        response.getWriter().write(content);
    }

    public String getUri() {
        String requestURI = ServletActionContext.getRequest().getRequestURI();
        return requestURI;
    }

    public String getUrl() {
        StringBuffer requestURL = ServletActionContext.getRequest().getRequestURL();
        return requestURL.toString();
    }
}
